This cordless picture light way outshines any others bright dimmable over 100 hours of battery life and remote controlled. Advanced solid state circuit using pulse width modulation. Safe for artwork- no UV or heat for pictures up to 3 ft wide. Remote control with dimming included. Use 1 controller for multiple lights. Lamp requires 4 D batteries remote requires 2 AAA batteries not included. The maintenance free LEDs last virtually forever due to their 50000 hour rating. They provide an unparalleled warm white color temperature and superior dispersion of light as compared to traditional LEDs for a warm even glow over artwork. Minimum vertical profile looks like a conventional picture light.